Ribbon cartridge



FIG. 1 is a front, bottom, side perspective view of a ribbon cartridge, showing my new design;

FIG. 2 is a front elevational view of a ribbon cartridge, showing my new design;

FIG. 3 is a rear elevational view of a ribbon cartridge, showing my new design;

FIG. 4 is a bottom plan view of a ribbon cartridge, showing my new design;

FIG. 5 is a right side elevational view of a ribbon cartridge, showing my new design;

FIG. 6 is a top plan view of a ribbon cartridge, showing my new design; and,

FIG. 7 is a left side elevational view of a ribbon cartridge, showing my new design. 

The ornamental design for a ribbon cartridge, as shown and described. 